Do you have socially unacceptable writing? Come on in....
Oh, good question. To be sure you should repost this question in, Technical support Page "Technical Support Forum" . However, I believe that posting is based on the rating of the intro (and the viewing preferences of the reader; some people will never see an 18+ listing, but that's a GOOD thing because they aren't the ones who want to see it.) So as long as your Intro is E, you'll get exposure.